For the following questions answer them individually
A train of length 442 metres crosses an electric pole in 13 seconds and crosses another train of the same length travelling in opposite direction in 17 seconds. What is the speed of the second train?
A person borrows some money for 5 years at a certain rate of simple interest. If the ratio of principal and total interest is 5 : 1, then what is the annual rate of interest?
A sells a bottle to B at the profit of 30 percent and B sells it to C at a loss of 20 percent. If C pays Rs. 3744 for the bottle, then what is the cost price of bottle for A?
The difference between compound interest (compounding annually) and simple interest on a sum of Rs.80,000 for 2 years is Rs. 288. Find the rate of interest per annum.
Average of 8 numbers is 47. The average of first three numbers is 53 and the average of next two numbers is 55. If the sixth number is 7 and 10 less than seventh and eighth number respectively, then what is the value of eighth number?
The average age of 17 students of a class is 20 years. If a new student of age 38 years joins the class, then what will be the average age of these 18 students?
A student scores 60% in an exam and gets 24 marks less than another student who scored 80%. What is the maximum marks in the exam?